Improved Shaft Seal Material Used In All Vane-Type Hydraulic Pumps; Seal Kits Are Canceled{5055}
Usage:
All machines with Vane-Type Hydraulic Pumps
Description of Change: New seals are used on the shaft for vane-type hydraulic pumps. The rubber material in the new seals will keep its normal hardness at a higher temperature than the former rubber material. The new seal will prevent leaks caused by the rubber material getting hard because of heat.
The kits for vane-type hydraulic pumps are now canceled and the seals are available separately. The seal kits had two shaft seals, but the second shaft seal was not needed for the earlier pumps which used only one shaft seal.
Adaptable As: Direct replacement. The chart gives the diameter of the pump shaft where the seal is installed.
Caterpillar Information System:
1977/11/21 Larger Diameter Holes Are Now Used In The Rocker Arm Shaft To Give More Oil Flow To Rocker Arm Bearings{1102}
1977/11/21 New Crankshafts Do Not Have Lightening Holes And Lubrication Passages Connected Together{1202,1219}
1977/11/21 New Elbow Between Turbocharger And Air Inlet Manifold Has Hole For Ether Starting Aid{1058,1456}
1977/11/14 New Exhaust Manifolds Made Of Stronger Material{1059}
1977/11/14 Exhaust Valves With 30° Face Angle Now Used For Parts Service{1101,1103,1105}
1977/11/14 New Electric Starting Motor Has Longer Brush Life{1453}
1977/11/07 Precision Oil Pump Bearings Now Available{1304}
1977/11/07 Improved Crankshaft Main Bearings And Connecting Rod Bearings With Higher Strength Aluminum Alloy{1203,1219,1230}
1977/11/07 Crankshaft Support Groups Are Available To Measure Bent Crankshafts{0653,1202}
1977/10/31 Some Wobble Is Acceptable In Rubber Vibration Dampers For Crankshafts{1205}
1977/10/31 With New 5P7448 Adapter, Earlier Fuel Injection Valves And Nozzles Can Be Tested And Adjusted On The 5P4150 Nozzle Testing Group{0651,1254}
1977/10/31 New Governor Spring Changes Speed Regulation{1264,1286}
1977/11/21 New Housing And Impeller Assembly For Water Pump And Drive Group{1361}
1977/11/21 Add Chamfer To Cartridge Assembly Bearings To Prevent Oil Leakage{1052,1053}
1977/11/28 Reference Chart For Main And Connecting Rod Bearings{1203,1219,1230}
1977/12/05 Water Separators Needed On Machines And Engines In The Field With SMFS{1250,0336}
1977/12/05 New Oil Filter Base Has Reinforcement Around The Center To Prevent Possible Cracks{1306}
1977/12/05 Use The 5P8610 Auxiliary Fitting Group To Charge Two Suspension Cylinders At The Same Time{0690,7201}
1977/12/05 New Fuel Injection Valve Assembly Has Improved Internal Components{1254}
1977/12/12 Use Hardened Flat Washers With Diagonal-Split Hydraulic Flanges{5057,7553}
1977/12/12 New Coolant Tube And Regulator Housing Used With Water Cooled Exhaust Manifold Gives More Clearance For Hooks To Lift The Engine{1350,1355,1380}
1977/12/12 Excessive Oil Consumption Can Be Caused By Dirt In Air Inlet System Or By Flaking Of The Piston Compression Ring{1213,1215}
1977/12/19 Improved Mounting Base For Air Compressor{1065}
1977/12/19 New 5P7450 Torque Multiplier For Torque Applications Up To 1500 LB FT (2030 N·m){0614}